Unable to get WPS to work

1st off I know the WPS button on the router does not work.

I'm trying to connect a Dell B1160w printer to a FIOS wouter. I log into the router control panel and go to Wi-Fi Protected Setup (WPS),  made sure that WPS was enabled, I then go to the printer and pressed the WPS button which is blinking which indicates that it is trying to connect to the network. I then go to the router admin on the web and press the WEP button. 

I wait the two minutes and then I get the following.

WPS registration has timed out. Did not successfully add a WPS client to the network within 2 minutes.

Any suggestions?